Evidence from a variety of sources shows that the planet is warming
faster then it ever has before. Scientists believe that the change in climate
cannot be explained by natural factors. They believe that human activities
are enhancing the natural greenhouse effect.
Anthropogenic Greenhouse Effect: ________________
_________________________________________
_________________________________________
An increase in anthropogenic greenhouse gases is linked to the start of
the industrial revolution (when factories started to burn coal to power
machines). Let’s examine so activities that produce greenhouse gases.
Carbon Dioxide
 ________________________________________________________
o Fossil fuels are used to carry out ________________________
___________________________________________________
 ____________________________________________
o Forests are cleared of their trees to provide room for _________
___________________________________________________
 Not only do the trees no longer remove CO2 from the air
they release it when burned.
Methane
 __________________________
o Vegetation that is broken down in an _____________________
by bacteria produce ______________
 __________________________________
o ___________________ have methane
releasing bacteria in their gut to break
down food
 ________________________________________________________
o Rice is grown in _____________________________________
 When plants decompose under water their release
_________________
 ________________________________________________________
Nitrous Oxide
 ________________________________________________________
o Fertilizers attempt to increase the _______________ for plants.
 ___________
Nitrous Oxide is also
known as __________
Halocarbons
 Chlorofluorocarbons (CFC’s)
o Used as ____________________________________________
o Banned because it was responsible for the damage to the _____
__________________________________
o Takes __________________________________ to break down
Canada is less than ____________________________ but contributes
____________________________________________. Here is what we do.
________________:
 Canada is one of the coldest countries and generates greenhouse gases
as we ___________________________________________________.
____________________:
 _______________________________ have a major forestry industry
________________________:
 ______________ has the second largest oil sand reserve in the world
 One barrel of oil from oil sands generates __________ more
greenhouse gases as a barrel of conventional oil.
________________________:
 One tree absorbs _______________ of CO2 in it’s life time
 Road construction clears a lot of trees
 Cars use the roads which then produces other ___________________
________________________________:
 _________________________ produces CO2, CH4, N2O (nitrous
oxide) and halocarbons through ________________________
_______________________:
 Border between Canada and the United States
is the most ___________________ in Canada
 This involves clearing of land, building roads
and a large amount of transportation
____________________________:
 Clearing of land for ________________________________
 Raising ____________________________
_______________________:
 Flooding of land to build dams results in
large volumes of standing water
 Standing water results in ______________
_____________________________:
 Maritimes, Alberta and Saskatchewan produce energy by __________
________________________:
 Found in every providence and territory
 Generate _____________________
______________________:
 Air travel burns up large amounts of ________________________
 Many people travel around, into and out of our country by plane.
Homework:
1. Explain how the anthropogenic greenhouse effect is different from the
natural greenhouse effect
2. Describe how cutting down trees increases the amount of carbon
dioxide in the atmosphere
3. How do you think that you, as a Canadian, compare to people in other
countries in terms of greenhouse gas production?
4. Hydroelectric dams are often considered a sustainable way to produce
electrical energy. What are some of the problems associated with it?
Think environment and human impacts